Hiller H-23 Raven

Hiller H-23 Raven - overview version[/heading]
YH-23A - UH-12A tested by the army
H-23A - a lightweight two-seater ambulance helicopter, a military version of the UH-12A; wheeled chassis, engine Franklin O-335-4; 105 pcs
H-23B (OH-23B) - a multi-purpose military version of the UH-12A, skids instead of wheels, the engine is a Franklin O-335-6, later Lycoming VO-435-23B; 328 or 354 pcs
H-23C (OH-23C) - a multi-purpose military version of UH-12B, the three-seat "bubble" cabin, engine Franklin O-335-6; 145 pcs
H-23D (OH-23D) - multi-purpose version with a new rotor and gearbox and other modifications, engine Lycoming O-435-23B; 486 or 438 pcs
H-23F (OH-23F) - a four-seater military version of UH-12E4 for the army for the geodetic survey of central and south America, extended bow, engine Lycoming O-540-9A; 33 (22?) ks
H-23G (OH-23G) - a multi-purpose military version of the UH-12E, three-digit with dual steering, engine Lycoming O-540-9A; 538 (793?) ks

HTE-1 - two-seat training version of the UH-12A for the navy, wheeled chassis, engine Franklin O-335-4; 17 pcs
HTE-2 - two-seat training version of the UH-12B for the navy, wheeled chassis, engine Franklin O-335-6; 55 pcs

Hiller HT.Mk.1 - 20 HTE-2 supplied to the british navy
Hiller HT.Mk.2 - analogue of the OH-23G for the british navy; 23 pcs
CH-112 Nomad - analogue of the OH-23G for the canadian army; 25 pcs

Hiller 360 - the prototype, a lightweight two-seater helicopter with engine Franklin 4AC-176
UH-12 - the first of the series, minor differences, UH, means the abbreviation of the company Universal Helicopters; about 70 UH-12/UH-12A
UH-12A - probably identical with the engine of a Franklin 6V4-200; together with the UH-12 originally sold under the name of the Hiller 360
UH-12B - modified the management, no, the dashboard is and rotor, engine Franklin 6V4-200; 145? ks
UH-12C - new rotor head, metal sheets instead of wooden, three-seat "bubble" cabin, engine Franklin 6V4-200; 55? ks
UH-12D - a corporate designation for a purely military version of the H-23D
UH-12E - the civilian equivalent of a D, engine Lycoming O-540; 100+ pcs
UH-12E-L - conversions UH-12E with the rotor 'L'
UH-12E4 / E4 - a four-seater version of the UH-12E with an extended bow; 50+ pcs
UH-12L3 / L3 - the three-digit UH-12E with a new rotor "L", engine Lycoming VO-540-B1D; an unknown number of
UH-12SL3 / SL3 - L3 with the engine Lycoming TIVO-540-A2A with the compressor; an unknown number of
UH-12L4 / L4 - E4 with the rotor "L", engine Lycoming VO-540-C2A; an unknown number of
UH-12SL4 / SL4 - L4 engine Lycoming TIVO-540-A2A with the compressor; an unknown number of

UH-12E3 - the basic three-seat version of the renewed production
UH-12E3T - conversion of E3 with turbohřídelovým engine Allison 250
UH-12E4T - conversion of E4 with turbohřídelovým engine Allison 250
UH-12ET - conversions UH-12E with turbohřídelovým engine Allison 250
UH-12E5 - five-letter version of the renewed production, perhaps only a prototype

Production at the company Hiller ended in 1968. In 1971 a new company, Hiller Aviation, which bought the manufacturing rights and perhaps put a certain amount of new UH-12E and UH-12E4, later under the name Rogerson-Hiller. In 1994 the company was formed Hiller Aircraft company, which manufactures a version of the UH-12E3 and UH-12E4; about the licensed production is involved, or perhaps takes place, in China.

Harding, Steve. In.With. Army aircraft since 1947: An Illustrated Directory. Specialty Press, Stillwater, 1990. ISBN 0-933424-53-1.
Swanborough, G., Bowers, P. M. United States Navy Aircraft since 1911. Putnam Aeronautical Books, London 1990, ISBN 0-85177-838-0.
Thetford, Owen. British Naval Aircraft since 1912. Naval Institute Press, Annopolis 1991, ISBN 1-55750-076-2.
http://www.uswarplanes.net/h23.html